Raccoon density estimation from camera traps for raccoon rabies management DOI Creative Commons
Amy J. Davis,

Wesley C. Dixon,

Richard B. Chipman

и другие.

Journal of Wildlife Management, Год журнала: 2024, Номер 89(2)

Опубликована: Ноя. 26, 2024

Abstract Density estimation for unmarked animals is particularly challenging, yet density estimates are often necessary effective wildlife management. Raccoons ( Procyon lotor ) the primary terrestrial reservoir Lyssavirus rabies within United States. The raccoon variant (RRVV) actively managed at landscape scales using oral vaccination (ORV) eastern To effectively manage RRVV, it important to know of raccoons appropriately scale ORV baits distributed on landscape. We compared methods estimate densities from camera‐trap data versus more intensive capture‐mark‐recapture (CMR) across 2 land cover types (upland pine and bottomland hardwood) in southeastern States during 2019 2020. evaluated effect alternative camera configurations durations trapping used an N‐mixture model densities, including covariates abundance detection. further different scaling camera‐based counts, with maximum number seen any given image a day best explaining density. Camera‐trap were moderately correlated CMR r = 0.56). However, reliable when classifying category as index inform management (83% correct estimates), although our study fell into lowest classes only. Using cameras reduced bias uncertainty around estimates; however, if ≤6 traps site, line transect approach proved less biased than grid design. Camera should be conducted least 3 weeks accurate population area (<5% bias). show that can assign management‐relevant bins, but studies needed ensure reliability greater range environmental conditions densities.

Язык: Английский

Habitat-specific seasonal densities of sympatric raccoons and opossums in the southeastern United States DOI
Jacob E. Hill, Madison L. Miller, Richard B. Chipman

и другие.

Journal of Mammalogy, Год журнала: 2025, Номер unknown

Опубликована: Янв. 29, 2025

Abstract Raccoon and opossum densities have implications for rabies management, but estimates of seasonal both species are lacking rural nonagricultural habitats the southeastern United States, a core portion their geographic range. Consequently, it remains unclear whether 1 limit other, which is possible considering substantial niche overlap. We carried out mark–recapture study raccoons opossums in 4 (bottomland hardwood forest, riparian upland pine isolated wetlands) South Carolina, States (2020 to 2022), combined this with previous data from same (2017 2019) estimate habitat-specific spring fall densities. ranged 5.17 ± 0.96 animals/km2 fall) 1.63 0.83 (upland spring) were on average 19% higher compared spring. Opossum 10.35 1.98 1.11 1.55 divergent patterns among habitats. These low across all other studies likely result resource availability, consistent that minimal anthropogenic influence. observed positive association between raccoon trapping grids, suggesting do not suppress densities, increase increasing availability. Our results can be used inform oral vaccination efforts such as refining bait timing distribution these

Язык: Английский

Процитировано

0
Contrasting Patterns of Raccoon (Procyon lotor) Spatial Population Genomics Throughout a Rabies Management Area in Eastern North America DOI Creative Commons
Matthew W. Hopken,

Clara P. Mankowski,

Christine Thurber

и другие.

Evolutionary Applications, Год журнала: 2025, Номер 18(5)

Опубликована: Май 1, 2025

ABSTRACT Wide‐ranging, generalist species provide both interesting and challenging opportunities for research questions focused on population structure. Their continuous distributions ability to occupy diverse habitat types can obscure genetic signals of ancestry geographic clustering. However, spatially informed approaches are notable high‐resolution identification clusters that often elude more classical clustering models. The northern raccoon ( Procyon lotor ) is a broadly distributed in North America, with populations habitats ranging from dense urban rural landscapes. Wildlife management agencies have an interest understanding ecology, given their propensity human‐wildlife conflicts zoonotic diseases. We combined samples extensive tissue repository RADcapture panel 1000 microhaplotype loci conduct spatial analyses eastern America. Our objective was estimate patterns diversity the landscape may inform rabies management. Bayesian delineated multiple encompassed large areas across 22 US states 2 Canadian provinces. discovered potential phylogeographic split between central southern those northeast region, which correlates post‐Pleistocene recolonization detected multitude region. A finer scale structure identified using explicit demonstrated variable dispersal/gene flow within specific regions. Appalachian Mountain region restricted local connectivity among raccoons, while New York, Ohio River Valley, Québec, Alabama high connectivity. results this study highlight how ecology historical biogeography help contextualize contrasting hypotheses about influence movement patterns, disease risks at regional scales.

Язык: Английский

Процитировано

0
Influence of habitat and baiting strategy on oral rabies vaccine bait uptake by raccoons in the southeastern United States DOI
Jacob E. Hill, Madison L. Miller, Richard B. Chipman

и другие.

Applied Animal Behaviour Science, Год журнала: 2024, Номер 277, С. 106320 - 106320

Опубликована: Июнь 17, 2024

Язык: Английский

Процитировано

1
Raccoon density estimation from camera traps for raccoon rabies management DOI Creative Commons
Amy J. Davis,

Wesley C. Dixon,

Richard B. Chipman

и другие.

Journal of Wildlife Management, Год журнала: 2024, Номер 89(2)

Опубликована: Ноя. 26, 2024

Abstract Density estimation for unmarked animals is particularly challenging, yet density estimates are often necessary effective wildlife management. Raccoons ( Procyon lotor ) the primary terrestrial reservoir Lyssavirus rabies within United States. The raccoon variant (RRVV) actively managed at landscape scales using oral vaccination (ORV) eastern To effectively manage RRVV, it important to know of raccoons appropriately scale ORV baits distributed on landscape. We compared methods estimate densities from camera‐trap data versus more intensive capture‐mark‐recapture (CMR) across 2 land cover types (upland pine and bottomland hardwood) in southeastern States during 2019 2020. evaluated effect alternative camera configurations durations trapping used an N‐mixture model densities, including covariates abundance detection. further different scaling camera‐based counts, with maximum number seen any given image a day best explaining density. Camera‐trap were moderately correlated CMR r = 0.56). However, reliable when classifying category as index inform management (83% correct estimates), although our study fell into lowest classes only. Using cameras reduced bias uncertainty around estimates; however, if ≤6 traps site, line transect approach proved less biased than grid design. Camera should be conducted least 3 weeks accurate population area (<5% bias). show that can assign management‐relevant bins, but studies needed ensure reliability greater range environmental conditions densities.

Язык: Английский

Процитировано

1